Roasting-furnace.



W. A. RANKIN. ROASTING FURNAGE. APPLIUATION FILED .1411.12, 1906.

Patented sept. 29,1908.

M1 INVENTOR TTORNEIC WITNESSES.-

1H: Nomzls Feniks ca., wAsHlNcraN. D. c.

UNITED sTATEs PATENT oEEIoE.

WILLIAMVA. RANKIN, OF MILWAUKEE, WISCONSIN, ASSIGNOR TO ALLIS-GHALMERS COMPANY, OF MILWAUKEE,`WISCONSIN, A CORPORATION OF NEW JERSEY.

ROASTING-FURNACE.

Specication of Letters liatent.

Patented sept. 29, 190s.

Application filed January 12, 1906. Serial No. 295,720.

To all whom it may concer/n:

Beit known that I, WILLIAM A. RANKIN, a

Stateof Wisconsin, have invented certain new and useful Improvements in Roasting- Furnaces, of which the following is a speci- JIication. I

This invention relates to temperature control of a working member.

This invention has utility when applied to ore roasting furnaces. When used in the arms of such a furnace, efficient means is provided for economically preventing a weakeningof the arm due to excessive heat. j

Referring to the drawingsz Figure 1 1s a partial vertical section of an embodiment of the invention as applied to the rabble arms of an ore roasting furnace. Fig. 2 is a section on line II-II of Fig. 1.

The hollow working member or arm 1 has the heat conductor lining 2. This lining 2 is maintained in position by the filling or packing 3, which may bethe sand core. Abutting the inner end of the arm is the gasket 4, which may be a good -heat conductor and serve to conduct the heat from the arm and its lining 2 to the cooling medium passing through the hollow shaft 5. The temperature controlled rotatable shaft v5 has the pipe 6 therein which mayserve for the introduction of a liquid, as' water. Surrounding the gasket 4 and the abutting anges of the arm 1 and shaft 5is the split ring 7 serving to' protect the heat conductors.

What is claimed and it is desired to secure by Letters Patent is:

1. A shaft, means permitting circulation of a medium therein, a hollow arm, a heat conductor lining, and a gasket for the arm.

2. A shaft, a heat conductor lined arm7 and'a heat conductor gasket between the shaft and arm. 4

3. A hollow shaft having lateral openings, heat conductor lined arms, and heat conductor gaskets between the arms and shaft.

4. The combination with a self-supporting member subjected to high temperatures and strains and rendered flexible upon an excess of heat reaching it, of a heat conductor secured closely adjacent thereto to receive excess heat therefrom and transfer the heat away from said member to some point where the heat can be conveniently dissipated.

5. The combination with a self-supporting hollow member subjected to hi h temperatures and strains and rendered exible upon an excess of heat reaching it, of a heat conductor secured within said member and adj acent the interior surface thereof, said heat conductor being extended out of said member to convey heat from said member to a point where it may be conveniently dissipated.

6. The combination with a hollow member adapted to be exposed to high temperatures, of a heat conductor disposed wlthin said member adjacent the interior surface thereof and extended out of said member and adapted to -convey heat from said member to a point where it lmay be conveniently dissiated, and means contained within said holow member to retain said heat conductor in contact with the interior surface thereof.

7. The combination with a self-supporting hollow member subjected to high temperatures and strains and rendered flexible upon an excess of heat reaching it, of a heat conductor forming a lining secured within and fitting said member, said conductor being extended out of said member to convey heat from said member to a oint where it may be conveniently dissipatedi 8. The combination with ahollow shaft provided with an aperture, of a hollow arm aving one end open secured to said shaft, with the open end ofthe arm re istering with said aperture, a metal heat conducting lining -contacting with the surface of the interior of said arm, and a metallic heat conducting gasket contacting with said heat conducting lining and preventing communication between the interior of said arm and said hollow shaft while resenting an ex osed surface to a fluid w 'ch may be contained in said shaft.

9. The combination with a hollow shaft provided with an aperture, of a hollow arm having one end o en secured to said shaft with the open eng of the arm registering with said aperture, a metal heat conducting 1 lining contacting with the surface of the interior of said arm, a metallic heat conduotf In testimony whereof' I affix my signature ing gasket contacting with said heat oonductl in presence of two witnesses. ing lining and preventing communication between the interior of said arm and said llol- WILLIAM A' RANKIN' 5 low shaft while presenting an exposed sur- Witnesses:

face to a Huid which may be contained in GEO. E. KIRK,

said shaft, and a filling for said hollow arm. G. F. DE WEIN. 

